Question: Which taxon has the highest observed lifespan?
Paraphrase: What is the taxon with the highest lifespan?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q16521 . ?ent wdt:P4214 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Fitzroya, Sequoiadendron giganteum, Juniperus occidentalis, Taxodium distichum, Pinus aristata